对比系数

In this paper,using simple but effective experimental apparatus the effective heat conductivity of three types of TIM s was measured.

用一套简易有效的实验装置测定了三种透明隔热材料的有效导热系数，并与通用计算模型进行对比，两者符合较好，验证了实验方法和通用计算模型的有效性。

The heat conductivity calculation has been divided into two parts, form the borehole to the exposure of cement mantle and in the formations, as for corresponding to different borehole structures, different methods have been adopted to sum the overall heat transfer coefficients and numerical method is used to calculate the heat loss on each nodal point, furthermore, through the model proposed herein, the degrees of influences of different borehole structures on heat loss could be calculated in order to get the most economic and efficient borehole structure.

把导热分为井筒到水泥环外壁和地层导热两部分计算，对不同的井筒结构采用不同方法计算总传热系数，数值法求解每个节点处的热损失，并通过模型对比计算了不同井筒结构对井筒热损失的影响程度，得到最经济有效的井筒结构。

The theoretical and experimental research on the elasto-plastic buckling strength of the web with longitudinal stiffener in I-section steel girder under pure bending was made using energy method and the influence of stiffness of longitudinal stiffener on buckling coefficient of the girder web was analyzed.

对工字钢梁腹板在纯弯作用下的弹塑性屈曲承载能力进行了理论计算和试验研究，并进行了对比分析，着重研究了纵向加劲肋刚度对腹板屈曲系数的影响－对现行《钢结构设计规范》（GBJ17－ 88）的有关条款进行了讨论

With reforming ratio increasing,the maximal temperature and thermal efficiency of theory cycle is increasing,but the maximal pressure would be decreasing with reforming ratio increasing due to influence of moles.5 Kit experiment results of RE compared to that of hydrous-ethanol vapor engine are studied.

随着重整率的提高，理想循环的最高温度逐渐增大，由于分子体积变化系数的影响，循环最大压力随着重整率的提高逐渐下降；随着重整率的提高，循环热效率逐渐增加。5对比分析了RE发动机和VE发动机台架试验结果。

Firstly, PLL linear model is established in order for the comparative analysis between phase step error response and phase rectangular-pulse error response under different damping ratio. The ideal PD waveform expression is figured out.

首先通过建立锁相环的线性化模型，对比分析了不同阻尼系数的相位阶跃误差响应和矩形相位误差响应，推导了理想状态下鉴相器输出的波形表达式。

The main contents are as follows:Firstly, starting with the general situation of soil erosion and the harms caused by it, the causes leading to the local soil erosion problem are analyzed comprehensively in the paper. And connecting with the measures taking place, sticking points towards the career of soil and water conservation are expatiated upon.Secondly, Back-Propagation Neural Network, One of Artificial Neural Network is used to set up a modal about the connection of the soil erosion modulus and seven factors impacts on it, such as, rainfall, rainfall largest intensity in 30 minutes, runoff coefficient, vegetation cover percent, rate of granule, rate of physical viscidity-clay, the rate of organic matter. Through the comparison with linear regression model, the second regression model, the Chinese Soil Loss Equation, it illustrated that BP Neural Network modal is more accurate than the other three modals in forecasting the mount of soil erosion, and the BP Neural Network will have some applicability in forecasting in soil erosion.

本文以霍山县作为皖西大别山区的典型区域，主要研究了以下内容：(1)从介绍霍山县土壤侵蚀状况以及所造成的危害入手，全面分析了导致当地土壤侵蚀发生的原因，并结合当地采取的水土保持相关措施，阐述了当地水土保持工作的症结所在；(2)结合上土市水土保持试验站多年实测资料和2005年实验资料，应用BP神经网络理论，建立了次降雨土壤侵蚀量与次降雨量、最大30min雨强、径流系数、植被覆盖度等因子之间关系的模型，并通过BP神经网络的预测模型与一次回归模型、二次回归模型、CSLE模型之间的对比分析，说明了建立的BP神经网络模型在土壤侵蚀预测可以取得较回归模型和CSLE模型更高的精度，也说明了BP神经网络理论在土壤侵蚀预报中具有一定的适用性。

Theoretical analysis of strip mills AGC had been processed and a three-DOF mathematical model of hydraulic screw-down system had been built,which was specified cylinder displacement and inner gap and adapt to varied control way.

对板带轧机自动厚度控制模型进行了理论分析，建立了三自由度轧机负载的液压压下系统的模型，将缸位移和内辊缝相区分，使其适用于不同的控制方式，进而对厚度计式控制模型、变形的厚度计式控制模型、动态设定控制模型进行了对比研究，指出轧机模数和轧件塑性系数分别对应于自动厚度控制系统的静态指标和动态指标，为控制过程中参数的选取提供理论依据。

This paper describes in-situ testing on thermal conductivity of lightweight thermal insulating wall by the guarded hot plate method .

利用防护热板法对轻质保温墙体导热系数进行了现场测试，通过数值分析和实验，并进行了对比测试，证明了该方法应用于此类墙体热工性能测试的可行性。

Air pressure distribution on sur-face of train(3 cars)and aerodynamic drag coefficient are obtained with sim-plified bogies and pantographs in calculations. Computational results are alsocompared with those given by model test in wind-tunnel.

计算中对转向架和受电弓处作了简化处理，得到了三车编组情况下列车表面压力分布及气动阻力系数，并与列车模型风洞实验结果进行了对比。

Laser-textured specimens exhibited lower and stable friction coefficient as compared with untextured specimens under dry friction. The textured surfaces also exhibited lower wear rate than that of untextured specimens. It was found that micro-dimples acted as traps for wear debris, and hence decreased abrasive wear.

在相同试验条件下与未织构面对比，织构面的摩擦系数均有不同程度减小且表现得更为稳定，并且磨损率也得到一定的降低，这是由于所制备的表面微坑起到了捕获磨屑的作用。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷